Monstruo en la noche

Although this film reportedly wasn't one of director Jack Arnold's favorites, I personally have enjoyed it very much through many viewings. The story is a Jekyll-Hyde variation, but it offers real suspense and some genuine scares from a director that knows how. The only (minor) disappointment is the creature's makeup (not seen 'til near the end), which unfortunately is revealed to us in a brightly-lit room; makeups like this are more effective when glimpsed fleetingly in the dark. That small quibble aside, this film offers lots of scary fun for those in the mood. (The same can be said of Arnold's earlier films for the same studio, "It Came From Outer Space" (1953) and "Tarantula" (1955).